Ubuntu Manpage: df - report file system disk space usage

Provided by: coreutils_8.21-1ubuntu5.4_amd64

NAME

       df - report file system disk space usage

SYNOPSIS

       df [OPTION]... [FILE]...

DESCRIPTION

       This  manual page documents the GNU version of df.  df displays the amount of disk space available on the
       file system containing each file name argument.  If no file name is given, the  space  available  on  all
       currently  mounted  file  systems  is  shown.   Disk  space  is shown in 1K blocks by default, unless the
       environment variable POSIXLY_CORRECT is set, in which case 512-byte blocks are used.

       If an argument is the absolute file name of a disk device node containing a mounted file system, df shows
       the  space available on that file system rather than on the file system containing the device node (which
       is always the root file system).  This version of df cannot show the space available  on  unmounted  file
       systems,  because  on most kinds of systems doing so requires very nonportable intimate knowledge of file
       system structures.

OPTIONS

Show information about the file system on which each FILE resides, or all file systems by default.

Mandatory arguments to long options are mandatory for short options too.

-a, --all
include dummy file systems

-B, --block-size=SIZE
scale sizes by SIZE before printing them. E.g., '-BM' prints sizes in units of 1,048,576 bytes.
See SIZE format below.

-h, --human-readable
print sizes in human readable format (e.g., 1K 234M 2G)

-H, --si
likewise, but use powers of 1000 not 1024

-i, --inodes
list inode information instead of block usage

-k like --block-size=1K

-l, --local
limit listing to local file systems

--no-sync
do not invoke sync before getting usage info (default)

--output[=FIELD_LIST]
use the output format defined by FIELD_LIST, or print all fields if FIELD_LIST is omitted.

-P, --portability
use the POSIX output format

--sync invoke sync before getting usage info

--total
elide all entries insignificant to available space, and produce a grand total

-t, --type=TYPE
limit listing to file systems of type TYPE

-T, --print-type
print file system type

-x, --exclude-type=TYPE
limit listing to file systems not of type TYPE

-v (ignored)

--help display this help and exit

--version
output version information and exit

Display values are in units of the first available SIZE from --block-size, and the DF_BLOCK_SIZE,
BLOCK_SIZE and BLOCKSIZE environment variables. Otherwise, units default to 1024 bytes (or 512 if
POSIXLY_CORRECT is set).

SIZE is an integer and optional unit (example: 10M is 10*1024*1024). Units are K, M, G, T, P, E, Z, Y
(powers of 1024) or KB, MB, ... (powers of 1000).

FIELD_LIST is a comma-separated list of columns to be included. Valid field names are: 'source',
'fstype', 'itotal', 'iused', 'iavail', 'ipcent', 'size', 'used', 'avail', 'pcent' and 'target' (see info
page).

AUTHOR

       Written by Torbjorn Granlund, David MacKenzie, and Paul Eggert.

REPORTING BUGS

       Report df bugs to bug-coreutils@gnu.org
       GNU coreutils home page: <http://www.gnu.org/software/coreutils/>
       General help using GNU software: <http://www.gnu.org/gethelp/>
       Report df translation bugs to <http://translationproject.org/team/>

COPYRIGHT

       Copyright  ©  2013  Free  Software  Foundation,  Inc.   License  GPLv3+:  GNU  GPL  version  3  or  later
       <http://gnu.org/licenses/gpl.html>.
       This  is  free software: you are free to change and redistribute it.  There is NO WARRANTY, to the extent
       permitted by law.